WO2021196803A1

WO2021196803A1 - Method for manufacturing tire having different upper and lower bead diameters

Info

Publication number: WO2021196803A1
Application number: PCT/CN2020/142307
Authority: WO
Inventors: 滕雷; 杨德建; 杨才欣; 陈雪梅; 朱丽艳; 陈东; 吕建强
Original assignee: 山东玲珑轮胎股份有限公司
Priority date: 2020-04-03
Filing date: 2020-12-31
Publication date: 2021-10-07
Also published as: CN111559102A

Abstract

The present invention relates to the field of tire production processes, and more specifically, relates to a method for manufacturing a tire having different upper and lower bead diameters. The method comprises a tire building process. The invention employs a specific building drum and corresponding bead setters of different sizes to produce a tire. Blocks of different sizes are arranged at two sides of the building drum so as to match bead setting rings of different diameters. Diameters of two bead components of the same radial tire are different. Sizes of the bead setters correspond to diameters at two sides of the tire. The tire of the present invention is produced by using a specific building drum and corresponding bead setters of different sizes. The present invention enables locking of beads at two sides of a tire, thereby realizing production of tires, and overcoming related production defects in the prior art.

Description

Method for manufacturing tires with different bead diameters for upper and lower molds

Technical field

The invention relates to the field of tire production technology, in particular to a method for manufacturing tires with different bead diameters on upper and lower molds.

Background technique

Generally, the diameters of the upper and lower bead of ordinary tires are the same. Therefore, the tire manufacturing equipment is also symmetrical, that is, the diameters of the tire bead parts used to fix the tire bead are the same. With the continuous development of the automobile industry, there is a demand for some special markets, such as the different sizes of rims on both sides. Ordinary tires cannot be installed normally due to the limitation of the size of the bead. Similarly, the existing tire building equipment and methods cannot meet the production requirements of such asymmetric tires with different bead diameters on the upper and lower molds.

technical problem

The Chinese patent (authorized announcement number: CN 109531051 A) discloses a lightweight and high-strength wheel manufacturing method. This patent optimizes multiple production processes of the wheel on the basis of the existing technology, but does not involve the bead Diameter size is an inconsistent production situation. Therefore, the existing operating technology lacks relevant technology for manufacturing tires with different bead diameters from the upper and lower molds.

Technical solutions

The purpose of the present invention is to provide a method for manufacturing tires with different bead diameters for the upper and lower molds, so as to solve the problems raised in the background art.

In order to achieve the above objectives, the present invention provides the following technical solutions:

A method for manufacturing tires with different bead diameters for upper and lower molds, including the following steps:

Step 1: Mixing process; mix carbon black, rubber, oil, additives, accelerators and other raw materials together and process them in an internal mixer;

Step 2: Preparing the rubber part. The rubber material is fed into the extruder head to extrude different semi-finished rubber parts, such as tread, sidewall and rubber strip. The material cord passes through the calender and both sides of the cord are hung. A thinner layer of rubber;

Step 3: Bead forming process. The bead is made by winding many steel wires with glue. After vulcanization, the rubber and steel wires can be closely attached together;

Step 4: The process of producing the belt. In the spindle room, many steel wires pass through the threading plate, and then pass through the die plate at the same time as the rubber material to hang the glue on both sides of the steel wire. After the glue is hanged, the belt layer is cut to a specified angle and The width, width and angle depend on the tire specifications and the requirements of structural design;

Step 5: The tire building process, all the semi-finished products are assembled on the forming machine into a green tire. The tire is produced through a specific building drum and buckle discs of different sizes. The two sides of the building drum have forming tiles of different sizes. In order to meet different diameter traveler buckles, the diameters of the two bead components of the same radial tire are different. The size of the buckle plate corresponds to the inch on both sides of the tire. The tire passes through a specific building drum and corresponds to Realize production of buckle discs of different sizes;

Step 6: The vulcanization process, the molded tire is installed on the vulcanizer, and after appropriate time and conditions in the mold, the tire is vulcanized into a finished tire, and the finished tire will be sent to the final inspection area.

As a further solution of the present invention: the difference in the diameter of the bead on the left and right sides is between 0.5 inch and 1 inch.

As a further solution of the present invention: the size of the buckle plate corresponds to the size of the bead of the produced tire one-to-one.

As a further solution of the present invention: the size of the chamfers on both sides of the forming drum is different, the radius of the chamfer R1 on one side is in the range of 0.1mm to 70mm, and the radius of the chamfer R2 on the other side is the value In the range of 0.1mm to 50mm.

As a further solution of the present invention, there are angles α and β between the head tiles on both sides of the forming drum and the horizontal direction.

As a further solution of the present invention: the angles of the included angles α and β are determined according to the bead components used, and the sizes of the two are different. The value of the included angle α ranges from 0° to 45°, and the value of the included angle β is The range is 0°~45°.

As a further solution of the present invention: the bead is pushed by the buckle plate to hit the forming drum, and the left and right collisions are synchronized, and it is necessary to ensure that the bead is fixed on the chamfer R1 of the forming drum after the collision. On R2 and R2, there is no loosening and falling off of the beads.

Beneficial effect

Compared with the prior art, the beneficial effect of the present invention is: the present invention provides a method for manufacturing tires with different bead diameters on the upper and lower molds. In the tire building process, the building drum manufactured at the bead portion is involved. The corresponding size design and improvement of equipment such as the buckle plate and other equipment have achieved the goal of locking the bead on both sides of the tire, thereby realizing the production of the tire, and making up for the lack of technology in the prior art in this respect.

It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the application.

Description of the drawings

The drawings herein are incorporated into the specification and constitute a part of the specification to show embodiments in accordance with the application, and together with the specification are used to explain the principle of the application. At the same time, these drawings and text description are not intended to limit the scope of the concept of the present application in any way, but to explain the concept of the present application for those skilled in the art by referring to specific embodiments.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

Figure 1 is an explanatory diagram of the first embodiment of the forming drum involved in the present invention;

Figure 2 is an explanatory diagram of the second embodiment of the forming drum involved in the present invention;

Figure 3 is an explanatory view of the dimensions of the forming drum according to the embodiment of the present invention;

Fig. 4 is an explanatory diagram of molding of an embodiment of the present invention.

In the picture: 10-building drum, 11-head tile, 20-buckle plate, 61-left bead, 62-right bead.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or same elements.

Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Step 2: Preparing the rubber parts. The rubber material is fed into the extruder head to extrude different semi-finished rubber parts: tread, sidewalls and rubber strips. The material cord passes through the calender and both sides of the cord are hung. A thinner layer of rubber;

Step 3: Bead forming process, the bead is formed by winding many steel wires with glue. The rubber used for the bead has special properties. After vulcanization, the rubber and the steel wire can be closely attached together;

Step 3: The process of producing belts. In the spindle room, many steel wires pass through the threading plate, and then pass through the die plate at the same time as the rubber material to make the steel wires hang glue on both sides. After hanging the rubber, the belt layer is cut to the specified angle and width. The width and angle depend on the tire specifications and the requirements of the structural design;

Step 4: Tire building process. All semi-finished products are assembled on a forming machine into a green tire. The tire is produced through a specific building drum 10 and a buckle plate 20 of different sizes. The two sides of the building drum 10 have different sizes of molding. The size of the two bead components of the same radial tire is different. The size of the buckle disk 20 corresponds to the cinch on both sides of the tire, and the tire passes through a specific The forming drum 10 and the buckle disk 20 corresponding to different sizes are produced.

Step 5: The vulcanization process, the molded tire is installed on the vulcanizer, and after appropriate time and conditions in the mold, the tire is vulcanized into a finished tire. After the completion, the finished tire will be sent to the final inspection area.

The following is a description of the preferred embodiments of the present invention with reference to the accompanying drawings.

Example one:

Please refer to Figures 1 and 3, the purpose of the present invention is to provide a method for producing tires with different bead sizes. The present invention relates to a special molding 10 and a special buckle disk 20. Preferably, the forming drum 10 has different chamfer sizes from left to right, as shown in FIG. 3. The radius of side chamfer R1 is in the range of 0.1mm to 70mm, and the radius of side chamfer R2 is in the range of 0.1mm to 50mm. The size of the buckle disk used corresponds to the size of the bead used in the tire embodiment of the present invention one-to-one. When forming, the bead 62 with a smaller diameter corresponds to the I side with a larger chamfer, and the bead 61 with a larger diameter corresponds to the II side with a smaller chamfer.

Embodiment two:

Please refer to Figures 2 and 3, the purpose of the present invention is to provide a method for producing tires with different bead sizes. The head tiles 11 on both sides of the forming drum 10 involved in the present invention have certain angles α and β in the horizontal direction, and the angles of α and β are determined according to the bead components used, and the sizes of the two are different. The value range of α is 0°~45°, and the value range of β is 0°~45°.

Example three:

Please refer to FIG. 4, the present invention uses a building drum 10 for tire building description. The diameters of the two bead components of the same radial tire involved in the present invention are different, and the difference between the left and right bead diameters is between 0.5 inch and 1 inch. When forming, the bead hits the forming drum under the push of the buckle disc, and the left and right collisions are synchronized. And it is necessary to ensure that the beads are fixed on the chamfers R1 and R2 of the forming drum after the ring is hit, and the beads are not loose and fall off. The rest of the molding steps are the same as those of conventional tires.

The present invention provides a molding method for manufacturing tires with different bead diameters for upper and lower molds. In the tire molding process, the building drum, buckle disc and other equipment involved in the manufacture of the bead are designed and improved correspondingly. The purpose of locking the bead on both sides of the tire has been achieved, thereby realizing the production of the tire, and making up for the lack of technology in the prior art in this respect.

Industrial applicability

For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description, and therefore it is intended to fall within the claims. All changes within the meaning and scope of the equivalent elements of are included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

In addition, it should be understood that although this specification is described in accordance with the implementation manners, not each implementation manner only includes an independent technical solution. This narration in the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole The technical solutions in the various embodiments can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

A method for manufacturing tires with different bead diameters for upper and lower molds, which is characterized in that it comprises the following steps:

Step 1: Mixing process; mix carbon black, rubber, oil, additives, accelerators and other raw materials together and process them in an internal mixer;

Step 2: Preparing the rubber part. The rubber material is fed into the extruder head to extrude different semi-finished rubber parts, such as tread, sidewall and rubber strip. The material cord passes through the calender and both sides of the cord are hung. A thinner layer of rubber;

Step 3: Bead forming process. The bead is made by winding many steel wires with glue. After vulcanization, the rubber and steel wires can be closely attached together;

Step 4: The process of producing the belt. In the spindle room, many steel wires pass through the threading plate, and then pass through the die plate at the same time as the rubber material to hang the glue on both sides of the steel wire. After the glue is hanged, the belt layer is cut to a specified angle and The width, width and angle depend on the tire specifications and the requirements of structural design;

Step 5: Tire building process, all the semi-finished products are assembled on the forming machine into green tires. The tires are produced through a specific building drum (10) and buckle discs (20) of different sizes. The two building drums (10) There are formed blocks of different sizes on the side to meet the requirements of different diameter traveler buckles. The diameters of the two bead components of the same radial tire are different. Correspondingly, the tire is produced through a specific building drum (10) and buckle discs (20) of different sizes;

Step 5: The vulcanization process, the molded tire is installed on the vulcanizer, and after appropriate time and conditions in the mold, the tire is vulcanized into a finished tire. After the completion, the finished tire will be sent to the final inspection area.
The method for manufacturing tires with different bead diameters for upper and lower molds according to claim 1, wherein the difference between the bead diameters on the left and right sides is between 0.5 inch and 1 inch.
The method for manufacturing tires with different bead diameters on the upper and lower molds according to claim 1, wherein the size of the buckle disk (20) corresponds to the size of the bead of the tire produced one-to-one.
The method for manufacturing tires with different bead diameters for upper and lower molds according to claim 1, characterized in that the chamfers on both sides of the forming drum (10) are different in size, and the radius of the chamfer R1 on one side is taken as The value is in the range of 0.1mm to 70mm, and the radius of the chamfer R2 on the other side is in the range of 0.1mm to 50mm.
The method for manufacturing tires with different bead diameters for upper and lower molds according to claim 4, characterized in that there are angles α and β between the head tiles on both sides of the building drum (10) and the horizontal direction.
The method for manufacturing tires with different bead diameters for upper and lower molds according to claim 5, characterized in that the angles α and β are determined according to the bead components used, and the two are different in size, and the angle α The value range of is 0°~45°, and the value range of the included angle β is 0°~45°.
The method for manufacturing tires with different bead diameters for upper and lower molds according to claim 4, characterized in that the bead is pushed by the buckle plate (20) to hit the building drum (10), and left and right The collision ring is carried out synchronously, and it is necessary to ensure that after the collision ring, the beads are fixed on the forming drum chamfers R1 and R2, and the beads are not loose and fall off.